what I know is almost pointless. all factors of a odd perfect number would be odd and so :

[TEX]1=\sum {1/{\text {divisors(x)_{[y]}}}[/TEX] has to be solved to any odd perfect x.

[QUOTE=science_man_88;267059]what I know is almost pointless. all factors of a odd perfect number would be odd and so :

[TEX]1=\sum {1/{\text {divisors(x)_{[y]}}}[/TEX] has to be solved to any odd perfect x.[/QUOTE]

never mind I messed up on that because 1/1 is in all x versions of this.

[QUOTE=science_man_88;267061]never mind I messed up on that because 1/1 is in all x versions of this.[/QUOTE]

oh sorry it has to be 2 not 1 doh.

[QUOTE=fivemack;269008]I don't know anything cleverer than

[url]http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.92.3656&rep=rep1&type=pdf[/url][/QUOTE]

Burp .. Sorry

[url]http://www.mersenneforum.org/showpost.php?p=250577&postcount=303[/url]

1984 base [URL="http://en.wikipedia.org/wiki/Modem"]bitrate[/URL] (°t°h)

[QUOTE=CRGreathouse;269962]9600 * 4 = 38400, and 0x9600 (the way programmers write 9600_16 or "9600 in hexadecimal") is also 38400 = 0 * 16^0 + 0 * 16^1 + 6 * 16^2 + 9 * 16^3.[/QUOTE]

[URL="http://he.wikipedia.org/wiki/37_(%D7%9E%D7%A1%D7%A4%D7%A8)"]+#-"cuba"?[/URL]

2+6 .. 8+3+4 .. 15
4+6 .. 10+7+4 .. 21 ( 15+6 )
6+6 .. 12+11+4 .. 27 ( 21+6 )
8+6 .. 14+15+4 .. 33 ( 27+6 )
10 ... [COLOR="LemonChiffon"]it ( fatto [ri] .. noi [°] diamo i numeri ?[/COLOR]

anybody have to pay attention to us, we are very capable of multiplying ... "debt"

|°| |°| |°|

:cmd::loco::hello:


[URL="http://factordb.com/index.php?showid=1100000000452783111&base=2"]._
|_[/URL]

[QUOTE=science_man_88;270039]thanks should I make a pari code to figure out sequences ?[/QUOTE]


[COLOR="LemonChiffon"]e><'st[/COLOR]

proverb_i (italiano)

" ... ind°vina ind°vinell° chi fa |'°\/° nel cestell° ? ...

... c@2c@ in b°cca a chi ind°vina !"

[code]
d="1185509444152022841648725566087910189053"

1405432642173638164979672322705880815287564437433751895138174510467510021414915 = 3*5*367*3119*69045013679424769731834655899569*d
1405432642173638164979672322705880815289935456322055940821471961599685841793021 = 8731861*135768245068493742817106864858237*d
1405432642173638164979672322705880815292306475210359986504769412731861662171127 = 11*23*61*2621*3630269*8073258041210908250668627*d
1405432642173638164979672322705880815294677494098664032188066863864037482549233 = 3*4337*334031*122638790063*2224230082786096967*d
1405432642173638164979672322705880815297048512986968077871364314996213302927339 = 19*29*41*1747*167847918307*178961947880697872417*d
1405432642173638164979672322705880815299419531875272123554661766128389123305445 = 5*7*1042469*32491803981071388944316002711911*d
1405432642173638164979672322705880815301790550763576169237959217260564943683551 = 3^3*13*4463562833*756686958440066611414542149*d
1405432642173638164979672322705880815304161569651880214921256668392740764061657 = 13759*86162471411586804393395273354743091*d
1405432642173638164979672322705880815306532588540184260604554119524916584439763 = 79*431*34817746311257976494132737116740879*d
1405432642173638164979672322705880815308903607428488306287851570657092404817869 = 3*395169814717340947216241855362636729691*d
1405432642173638164979672322705880815311274626316792351971149021789268225195975 = 5^2*243031*7766322002892521*25123951273392613*d
1405432642173638164979672322705880815313645645205096397654446472921444045574081 = 418482017*2832880257676694484218961232181*d
1405432642173638164979672322705880815316016664093400443337743924053619865952187 = 3*7*128551*337739016540511*1300256488102823059*d
1405432642173638164979672322705880815318387682981704489021041375185795686330293 = 11*31*3476567284903292790758726000257801141*d
1405432642173638164979672322705880815320758701870008534704338826317971506708399 = 17*222127627079179*313944962961061549557281*d
1405432642173638164979672322705880815323129720758312580387636277450147327086505 = 3^2*5*115789409*26552015969*8568921542605466353*d
1405432642173638164979672322705880815325500739646616626070933728582323147464611 = 107*2397931*36553392199*126402851710208307889*d
1405432642173638164979672322705880815327871758534920671754231179714498967842717 = 463*2560495559723591450645195607101317903*d
1405432642173638164979672322705880815330242777423224717437528630846674788220823 = 3*47*109*2207*89237*25356943*327183049*47208958903*d
1405432642173638164979672322705880815332613796311528763120826081978850608598929 = 7^2*13^2*2750686171*52045260827309406669265943*d
1405432642173638164979672322705880815334984815199832808804123533111026428977035 = 5*53*383*581753*3118807*6437737115138702164111*d
1405432642173638164979672322705880815337355834088136854487420984243202249355141 = 3*971*1829400569*1555608334757*143006396127293*d
1405432642173638164979672322705880815339726852976440900170718435375378069733247 = 1913*593987*12885098671*80970227460553601999*d
1405432642173638164979672322705880815342097871864744945854015886507553890111353 = 19*787*4562854573*1889081561009*9197914083881*d
1405432642173638164979672322705880815344468890753048991537313337639729710489459 = 3^2*11*137*87407612191404766028808196275743581*d
1405432642173638164979672322705880815346839909641353037220610788771905530867565 = 5*23*2521*18011888666128297*227025728608911371*d
1405432642173638164979672322705880815349210928529657082903908239904081351245671 = 7*60352967*2806133657384525085684035967203*d
1405432642173638164979672322705880815351581947417961128587205691036257171623777 = 3*183388633*2154821747961559576139279337791*d
1405432642173638164979672322705880815353952966306265174270503142168432992001883 = 103*751379*15318235442646674898203358649003*d
1405432642173638164979672322705880815356323985194569219953800593300608812379989 = 643589*2235920651*823834581870438090084367*d
1405432642173638164979672322705880815358695004082873265637098044432784632758095 = 3*5*2713*29131574988377511774142414696840157*d
1405432642173638164979672322705880815361066022971177311320395495564960453136201 = 17*77349793*17982132029*50136701566680369233*d
1405432642173638164979672322705880815363437041859481357003692946697136273514307 = 13*43*2196781*361105093*2673454719102318205777*d
1405432642173638164979672322705880815365808060747785402686990397829312093892413 = 3^5*7*29*379*1697*102888413*363174364917251336671*d
1405432642173638164979672322705880815368179079636089448370287848961487914270519 = 37*439*859*84966085446319445543102085711779*d
1405432642173638164979672322705880815370550098524393494053585300093663734648625 = 5^3*11*97*563*15787820890590112103938108587353*d
1405432642173638164979672322705880815372921117412697539736882751225839555026731 = 3*569*28819590643628611*24098149214702386951*d
1405432642173638164979672322705880815375292136301001585420180202358015375404837 = 96724612123*834360953743*14689737979714661*d
1405432642173638164979672322705880815377663155189305631103477653490191195782943 = 108923*776047*14024823335167825768171006751*d
1405432642173638164979672322705880815380034174077609676786775104622367016161049 = 3*1951*30367447031849*6669882930999349618889*d
1405432642173638164979672322705880815382405192965913722470072555754542836539155 = 5*7*59*756023*759363912373653006776566299673*d
1405432642173638164979672322705880815384776211854217768153370006886718656917261 = 1019747*2012299*34532349113*16729923206798233*d
1405432642173638164979672322705880815387147230742521813836667458018894477295367 = 3^2*19*50144533991*138256420295284857836525599*d
1405432642173638164979672322705880815389518249630825859519964909151070297673473 = 2333*1732960597*235967770447*1242650222899003*d
1405432642173638164979672322705880815391889268519129905203262360283246118051579 = 31*389*98309100601378459378781455020143477*d
1405432642173638164979672322705880815394260287407433950886559811415421938429685 = 3*5*13*41*199*745132444053929963544253830810029*d
...
1405432642173638164979672322705880815562602628477021194400678841799905185275211 = 17*69735849656001343626395621534582952311*d
...

:cmd:
[/code]

Them ain't Bagels, they doughnuts
 

[QUOTE=ciic;270250]As Bagels usually have one - a hole - also, I might think, there's one in my own knowledge about the notation of the math.

'Cose: got me two books, first the famous one authored by Richard Crandall & Carl Pomerance: "Prime Numbers - A Computational Perspective" and 2nd a rather old book authored by Bruce, J.W, Giblin P.J., Rippon, P.J "Microcomputers and Mathematics" - with I found rather helpful and interesting.

My problem comes more with the first mentioned book by Crandall et al. it uses mathm. notations which I do not understand, e.g. an "=" with three horizontal lines and sum-signs and pi-signs and brackets...

Could someone please give me a hint, where I probaply could get information on this? Some "search-strings" for an extended google/amazon/wikipedia-search would also be very much helpful to me.

Cheers, ciic.[/QUOTE]

[URL="http://www.youtube.com/watch?v=4WB42LA-oOo"]Chico Marx[/URL]

cmd

PS Can't fool me: there ain't no sanity clause.

remember ... Who delete this, do sin ... and then die


ps : ( Just move or edit

[QUOTE=kar_bon;270943]Wow! You know, where this was used?

Please admins.... give this guy a big stop for everything doing in this forum... and the FactorDB, too.[/QUOTE]

see [URL="http://en.wikipedia.org/wiki/Arbeit_macht_frei"]here[/URL]

admins ... stop inter[URL="http://www.youtube.com/watch?v=CGUaj_42Nq8"]_area_[/URL]web too ! ... u can ...